20 Jul
2015
20 Jul
'15
1:45 a.m.
What are you going to do with it?Looking. For a wt78 but.... this fell in our lap....
Sent from my Verizon Wireless 4G LTE smartphone
-------- Original message --------
From: Brent Hilpert <hilpert at cs.ubc.ca>
Date: 07/19/2015 9:29 PM (GMT-07:00)
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Subject: Re: moving cleanout - partial DECmate I / VT278
Further to my earlier message today, something else to go:
DECmate I / VT278 monitor & CPU
This is the VT100 monitor/housing with the 6120-PDP8-microproc-based CPU board in one of
the logic slots.
Sadly, missing the keyboard and floppies unit, so it's not complete.
IIRC, I faked a keyboard-present signal at the keyboard-jack some time ago and got it to
produce some boot text on the screen.
See for example:? http://so-much-stuff.com/pdp8/decmateI/decmateI.php
. . found my notes about it from 2011:
------------------------------
DEC DECMate VT278-AC
1983
System:
? LSI PDP-8 in VT100 case.
? 6120 microprocessor (D1-6120-9 8)
? 6 * SIP memory modules w 4 chips each (21-17559-AA / 8252 DP)
? 2 * 6402 (UART)
? 2 * 6121 (PIO)
? SND 5027 D (video controller)
Pros & Cons:
? CON: Missing disk drive.
? CON: Missing keyboard.
2011 Jul: Powered up. PWR-OK and CPU-OK LEDs lit, CRT filament lit. No raster. Schematic
obtained from bitsavers. No video or sync signals from processor board to monitor board.
CG CHAR CLK to CRT Controller chip is present (1.5MHz), but no sync signals out from CRT
Controller. ROM, CPU, CRTC socketed chips rocked for contact, no change. CRT Controller
may not be getting initialised in initial ROM boot process.
Connecting ring (data) to tip (+12V) on keyboard connector after power-up brings up SET-UP
message and flashing cursor after several seconds.
------------------------------
20 Jul
20 Jul
3:22 a.m.
On 2015-Jul-19, at 10:45 PM, couryhouse wrote:
What are you going to do with it?Looking. For a wt78
but.... this fell in our lap....
While I did expect DEC-anything would attract more interest, I was figuring people would
have read my message from earlier in the day, here's the extract/backgrounder:
So my house sold yesterday after < 3 days on the market (the market here is nuts).
I have about two months to move, so a bunch of stuff has to disappear.
Location is the Vancouver, BC, Canada region (Port Moody more precisely).
Most of this stuff is larger and I'm not going to have a lot of time to pack &
ship, so local pickup is expected.
If there is competition for something I guess it goes to the one willing to offer the
greater number of bucks,
otherwise items are free as the alternative destination is recycling/scrap.
Any bucks involved are not because I expect a lot (or anything), but just to sort out who
'values' it the most
if there is multiple interest in an item.
I reserve the right to be whimsical in any decision.
At this point three (distant) parties have inquired about this item.
No, I don't want to scrap it, but I can't make promises for shipping something
this size at this time.
If someone is "really interested" (you have the other bits for example), let me
know.
Shipping just the CPU board may be another option.
(There has been no interest in all the other stuff at this point except the TRS-80 M100
and a question about the XT-clone.)
-------- Original message --------
From: Brent Hilpert <hilpert at cs.ubc.ca>
Date: 07/19/2015 9:29 PM (GMT-07:00)
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Subject: Re: moving cleanout - partial DECmate I / VT278
Further to my earlier message today, something else to go:
DECmate I / VT278 monitor & CPU
This is the VT100 monitor/housing with the 6120-PDP8-microproc-based CPU board in one of
the logic slots.
Sadly, missing the keyboard and floppies unit, so it's not complete.
IIRC, I faked a keyboard-present signal at the keyboard-jack some time ago and got it to
produce some boot text on the screen.
See for example: http://so-much-stuff.com/pdp8/decmateI/decmateI.php
. . found my notes about it from 2011:
------------------------------
DEC DECMate VT278-AC
1983
System:
? LSI PDP-8 in VT100 case.
? 6120 microprocessor (D1-6120-9 8)
? 6 * SIP memory modules w 4 chips each (21-17559-AA / 8252 DP)
? 2 * 6402 (UART)
? 2 * 6121 (PIO)
? SND 5027 D (video controller)
Pros & Cons:
? CON: Missing disk drive.
? CON: Missing keyboard.
2011 Jul: Powered up. PWR-OK and CPU-OK LEDs lit, CRT filament lit. No raster. Schematic
obtained from bitsavers. No video or sync signals from processor board to monitor board.
CG CHAR CLK to CRT Controller chip is present (1.5MHz), but no sync signals out from CRT
Controller. ROM, CPU, CRTC socketed chips rocked for contact, no change. CRT Controller
may not be getting initialised in initial ROM boot process.
Connecting ring (data) to tip (+12V) on keyboard connector after power-up brings up
SET-UP message and flashing cursor after several seconds.
------------------------------
3268
days inactive
3268
days old
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couryhouse＠aol.com -
hilpert＠cs.ubc.ca